c++ - What does minDist(100) and the curly braces in this piece of code mean? -


i've met piece of code made me confused. it's header file defines class named colordetector. private part follows:

class colordetector {   private:   // minimum acceptable distance   int mindist;    // target color   cv::vec3b target;    // image containing resulting binary map   cv::mat result;    // inline private member function   // computes distance target color.   int getdistance(const cv::vec3b& color) const {      // return static_cast<int>(cv::norm<int,3>(cv::vec3i(color[0]-target[0],color[1]-target[1],color[2]-target[2])));       return abs(color[0]-target[0])+                 abs(color[1]-target[1])+                 abs(color[2]-target[2]);   }

here's public declaration of class made me confused:

public:    // empty constructor   colordetector() : mindist(100) {        // default parameter initialization here       target[0]= target[1]= target[2]= 0;   }

i not quite clear grammar in constructor here. mindset(100) mean here , why target array written within curly braces? searched google keyword "default constructor" , "default parameter" found no relating articles. can tell me exact meaning of piece of code here?

the class of

this member initialization list see http://en.cppreference.com/w/cpp/language/initializer_list


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